US3741316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid operated percussion tool
Assignee: FORGES ET ATELLERS DE MEUDON S
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Filing: 1968-01-16
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Granted: 1973-06-26
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Expires: 1988-01-16
Abstract
Abstract Percussion tool actuated by an incompressible fluid, characterized in that the upper chamber of the cylinder is constantly responsive to the fluid pressure while the pressure is alternately applied to and removed from the lower chamber.
Inventors
- 👤 R Alajouanine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:01
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/06; B25D9/12; B25D9/14; B25D9/145; E; E21; E21B; E21B6/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
113 words
A percussion tool actuated by an incompressible fluid which comprises a cylinder, a piston slidably mounted in that cylinder and forming therein an upper chamber and a lower chamber, duct means adapted to cause said incompressible fluid to transmit by successive shocks the energy conveyed by said fluid under pressure to flow into and out of said chambers in order to impart a sustained reciprocating motion to said piston and further comprising an accumulator connected to the oil feed duct from the supply pump to the cylinder, said accumulator being adapted to store the excess fluid output during the upward stroke of the piston and to deliver same during the operative stroke thereof.
Claim 2
Dependent Claim
113 words
A percussion tool actuated by an incompressible fluid which comprises a cylinder, a piston slidably mounted in that cylinder and forming therein an upper chamber and a lower chamber, duct means adapted to cause said incompressible fluid to transmit by successive shocks the energy conveyed by said fluid under pressure to flow into and out of said chambers in order to impart a sustained reciprocating motion to said piston and further comprising an accumulator connected to the oil feed duct from the supply pump to the cylinder, said accumulator being adapted to store the excess fluid output during the upward stroke of the piston and to deliver same during the operative stroke thereof.
Claim 3
Dependent Claim
68 words
A tool as set forth in claim 2, which comprises a hydraulic motor, a tool-holding socket rotatably driven from said motor, and duct means connecting said motor to said upper chamber, whereby the oil forced out from said upper chamber by the upward stroke of said piston will actuate said motor and thus cause the tool to rOtate by one fraction of a revolution after each piston blow.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |